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Write Swift

Write Swift is an agent skill (a SKILL.md file) from emilkowalski/skills. How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics. It works with Claude Code and has 49,702 GitHub stars across a repository of 14 listed skills.

github.com/emilkowalski/skills/skills/write-swift (opens in a new tab)

Data as of from the GitHub API and skills.sh; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)View on skills.sh (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift ~/.claude/skills/write-swift   # personal, or .claude/skills in a project

In the Claude apps, zip the write-swift folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift .agents/skills/write-swift   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/emilkowalski/skills.git
cp -r skills/skills/write-swift .cursor/skills/write-swift   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

How to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features agents don't know about yet. Use when writing, reviewing, or migrating Swift, or when a concurrency error, a hang, a data race, a retain cycle, or a performance problem needs fixing.

When it triggers

  • Use when writing, reviewing, or migrating Swift, or when a concurrency error, a hang, a data race, a retain cycle, or a performance problem needs fixing.

More skills in emilkowalski/skills

14 skills are listed from this repository.

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More docs & writing skills

All Docs & writing

FAQ

Write Swift FAQ

Still curious? Email info@appsgit.com.

How do I install the Write Swift skill?

Copy the write-swift folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Write Swift skill free?

Yes. The repository is open source under the MIT license.

Is Write Swift maintained?

The repository's most recent commit was on Oct 11, 2026. appsgit only lists skills from repositories with a commit in the last six months.